Function PYBIND11_OVERRIDE

tests/test_virtual_functions.cpp:92–144

    const std::string *get_string2() override {
        PYBIND11_OVERRIDE(const std::string *, /* Return type */
                          ExampleVirt,         /* Parent class */
                          get_string2,         /* Name of function */
                                               /* (no arguments) */
        );
    }
};

class NonCopyable {
public:
    NonCopyable(int a, int b) : value{new int(a * b)} { print_created(this, a, b); }
    NonCopyable(NonCopyable &&o) noexcept : value{std::move(o.value)} { print_move_created(this); }
    NonCopyable(const NonCopyable &) = delete;
    NonCopyable() = delete;
    void operator=(const NonCopyable &) = delete;
    void operator=(NonCopyable &&) = delete;
    std::string get_value() const {
        if (value) {
            return std::to_string(*value);
        }
        return "(null)";
    }
    ~NonCopyable() { print_destroyed(this); }

private:
    std::unique_ptr<int> value;
};

// This is like the above, but is both copy and movable.  In effect this means it should get moved
// when it is not referenced elsewhere, but copied if it is still referenced.
class Movable {
public:
    Movable(int a, int b) : value{a + b} { print_created(this, a, b); }
    Movable(const Movable &m) : value{m.value} { print_copy_created(this); }
    Movable(Movable &&m) noexcept : value{m.value} { print_move_created(this); }
    std::string get_value() const { return std::to_string(value); }
    ~Movable() { print_destroyed(this); }

private:
    int value;
};

class NCVirt {
public:
    virtual ~NCVirt() = default;
    NCVirt() = default;
    NCVirt(const NCVirt &) = delete;
    virtual NonCopyable get_noncopyable(int a, int b) { return NonCopyable(a, b); }
    virtual Movable get_movable(int a, int b) = 0;

    std::string print_nc(int a, int b) { return get_noncopyable(a, b).get_value(); }
    std::string print_movable(int a, int b) { return get_movable(a, b).get_value(); }
};
class NCVirtTrampoline : public NCVirt {
#if !defined(__INTEL_COMPILER) && !defined(__CUDACC__) && !defined(__PGIC__)
    NonCopyable get_noncopyable(int a, int b) override {